Not only did Slashdot do karma early or the first in it's regular form and with quite a bit more finesse than most simple up-vote-down-vote, I'm pretty sure the

Not only did Slashdot do karma early or the first in it's regular form and with quite a bit more finesse than most simple up-vote-down-vote, I'm pretty sure they're the very first with automatically delegated meta-moderation: Given your metrics on karma, visits, etc, to decide whether a rating was fair or not. Again, like moderation, not a permanent role, limited to meta-modding around 5 comments. That was a lot of fun as rated comments tended to be great or awful, the great ones often in an article I hadn't clicked so get to read through something new, and the awful ones quite amusing, Slashdot did have a large subset of trolls that were very smart, sarcastic and scathing.